Pope Francis has proven to be more controversial than many had expected, and there is a more conservative wing of the Catholic church that is increasingly unhappy with his positions on a variety of topics that seem to contradict traditional church teachings. One of the latest examples is his blessing of cutting edge research that mixes human cells into animal bodies.
Juan Carlos Izpisua Belmonte is a prominent stem-cell biologist who is attempting to grow human tissue inside farm animals such as pigs, sheep, and cows. In this research, scientists inject human stem cells into animal embryos and then try to grow the mixtures inside surrogate animals.
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